Pressure-controlled injector with serially connected control valves
AssigneeRobert Bosh GmbH
InventorFriedrich Boecking
Life of this patent
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Abstract
An injector for injecting fuel in a combustion chamber of an internal combustion engine has a housing provided with a housing opening, a control valve body movable in the opening of the housing, a ring chamber which encloses the control valve body, an inlet connectable with a high pressure collecting chamber and opening into the ring chamber, a nozzle inlet arranged so that during the movement of the control valve body the nozzle inlet is connected with the inlet or separated from the latter, and 2/2-way control valves arranged inside the housing in series so that one of the 2/2-way control valves is force-equalized in an open condition.
Claims11
An injector for injecting fuel in a combustion chamber of an internal combustion engine, comprising a housing provided with a housing opening;
- a control valve body movable in said opening of said housing;
- a ring chamber which encloses said control valve body;
- an inlet connectable with a high pressure collecting chamber and opening into said ring chamber;
- a nozzle inlet arranged so that during the movement of said control valve body said nozzle inlet is connected with said inlet or separated from the latter;
- and 2/2-way control valves arranged inside said housing in series so that one of said 2/2-way control valves is force-equalized in an open condition, one of said 2/2-way control valves being formed as a ball-shaped control valve and having a closing element;
- and a spring element which is arranged in a hollow chamber of said housing and adjusts said closing element of said ball-shaped control valve against an end surface of said control valve body.
An injector for injecting fuel in a combustion chamber of an internal combustion engine, comprising a housing provided with a housing opening;
- a control valve body movable in said opening of said housing;
- a ring chamber which encloses said control valve body;
- an inlet connectable with a high pressure collecting chamber and opening into said ring chamber;
- a nozzle inlet arranged so that during the movement of said control valve body said nozzle inlet is connected with said inlet or separated from the latter;
- and 2/2-way control valves arranged inside said housing in series so that one of said 2/2-way control valves is force-equalized in an open condition, one of said 2/2-way valves being a ball-shaped valve and having a closing element which moves in its sealing seat when the other of said 2/2-way control valves is opened.
An injector for injecting fuel in a combustion chamber of an internal combustion engine, comprising a housing provided with a housing opening;
- a control valve body movable in said opening of said housing;
- a ring chamber which encloses said control valve body;
- an inlet connectable with a high pressure collecting chamber and opening into said ring chamber;
- a nozzle inlet arranged so that during the movement of said control valve body said nozzle inlet is connected with said inlet or separated from the latter;
- and 2/2-way control valves arranged inside said housing in series so that one of said 2/2-way control valves is force-equalized in an open condition, one of said 2/2-way valve being ball-shaped and being moved to its open position when the other of said 2/2-way valve is moved with its seat diameter into a seat surface provided in said housing.
Dependencies are inferred from the claim text.